A bridge launching support system suitable for large-scale axis misalignment and high-rise beam placement.

Abstract

This application discloses a bridge jacking support system suitable for large-scale axis misalignment and high-drop beams. It includes an assembly support and a jacking support. The jacking support comprises a support frame, a first jack, a second jack, and a sliding block. The support frame has an upper and a lower section, which can rotate relative to each other in the vertical direction. The first jack is fixedly installed vertically on the lower section of the support frame, and the second jack is fixedly installed horizontally on the upper section. The movable end of the second jack is connected to the sliding block, which supports the steel box girder. The first jack lifts the support frame, thereby lifting the steel box girder. The second jack facilitates the movement of the sliding block, thus advancing the steel box girder. Furthermore, the relative rotation of the upper and lower sections of the support frame allows for changing the direction of advancement during the process to accommodate axis misalignment.

Description

Technical Field

[0001] This application relates to the field of box girder launching construction technology, and in particular to a bridge launching support system suitable for large-scale axial offset and high-drop girder. Background Technology

[0002] As urban development moves towards livability and greenness, the construction of municipal bridges, as a crucial part of urban infrastructure, inevitably bears greater responsibility for aesthetic appeal. The landscaping of urban bridges faces challenges such as larger spans, more complex designs, and higher technological standards, placing higher demands on their construction. The construction of urban steel structure bridges spanning rivers often faces difficulties due to flood control constraints, including the inability to construct cofferdams, the lack of conditions for constructing supports in the river, the lack of working surfaces for side hoisting operations, and the lack of conditions for overall installation. Under these unfavorable external constraints, how to quickly and economically achieve the installation of large-span urban steel structure bridges while ensuring safety and quality is a topic worthy of in-depth study.

[0003] When the river channel is wide and crane erection is not feasible, the jacking method is generally used to construct large-span steel structure bridges. However, this method is not suitable for situations where the central axis of the steel box girder may shift significantly during the jacking process or when the bridge falls a large distance. Utility Model Content

[0004] The purpose of this application is to provide a bridge jacking support system suitable for large-scale axis misalignment and high-rise girder placement, so as to improve the problem of large-scale axis misalignment during the advancement of steel box girders.

[0005] Firstly, this application provides a bridge jacking support system suitable for large-scale axial offset and high-rise beam placement, employing the following technical solution:

[0006] A bridge jacking support system suitable for large-scale axial offset and high beam drop includes an assembly support and a jacking support. The assembly support is arranged in multiple rows along the length of the bridge, and the jacking support is arranged in multiple groups along the length of the bridge. Each group of jacking supports is located between two adjacent rows of assembly supports.

[0007] The jacking support includes a support frame, a first jack, a second jack, and a slide. The support frame has an upper part and a lower part, which can rotate relative to each other in the vertical direction. The first jack is fixedly installed in the lower part of the support frame in the vertical direction, and the second jack is fixedly installed in the upper part of the support frame in the horizontal direction. The movable end of the second jack is connected to the slide, which is used to support the steel box girder.

[0008] By adopting the above technical solution, the first jack is used to lift the support frame, thereby lifting the steel box girder. The second jack facilitates the movement of the sliding block, thereby advancing the steel box girder. In addition, the upper and lower parts of the support frame can rotate relative to each other, which facilitates changing the direction of advancement during the advancement process to adapt to the situation of the central axis offset. The overall height is increased by the ground support and cooperates with the assembly support to lower it to a certain height. A section of the ground support and assembly support is removed to adapt to the problem of the large drop distance of the bridge.

[0009] Optionally, the upper and lower halves of the support frame can be fixed relative to each other by bolts.

[0010] Optionally, the upper part of the support frame is provided with two guide rails along the moving direction of the movable end of the second jack. The two guide rails are located on both sides of the slide block, and the slide block is slidably connected to both guide rails.

[0011] The above technical solution guides the slide block via a guide rail, improving the stability and accuracy of the slide block's movement, thereby achieving precise propulsion.

[0012] Optionally, the slide is provided with a top plate, the bottom of the top plate is provided with a damping plate, the slide is provided with a damping groove for the damping plate to be inserted, and a damping assembly is provided between the damping plate and the damping groove.

[0013] The above technical solution uses vibration damping components to reduce the vibration of the top plate, thereby reducing the impact of vibration on the advancement of the steel box girder and further improving the advancement accuracy.

[0014] Optionally, the vibration damping assembly includes a damper and a vibration damping spring. One end of the damper is connected to the vibration damping plate, and the other end is connected to the side wall of the vibration damping groove. One end of the vibration damping spring abuts against the vibration damping plate, and the other end abuts against the side wall of the vibration damping groove.

[0015] The above technical solution, through the cooperation of dampers and vibration reduction springs, buffers and absorbs energy on the top plate, thereby achieving vibration reduction.

[0016] Optionally, the damper includes a shaft and a sleeve, the sleeve having a buffer hole for the shaft to be inserted into, the buffer hole being filled with a non-Newtonian fluid.

[0017] By adopting the above technical solution, non-Newtonian fluid can achieve better buffering. At the same time, regardless of whether the shaft is close to or far from the bushing, when the instantaneous displacement is large, the shaft will be subject to the resistance from the non-Newtonian fluid, which further improves the buffering and energy absorption effect, thereby ensuring the vibration reduction effect.

[0018] Optionally, the first jack is provided with a first movable cavity and a second movable cavity. A first piston slides in the first movable cavity, and a lifting rod for connecting to a support frame is connected to the top of the first piston. A second piston slides in the second movable cavity, and the top of the second piston extends out of the second movable cavity. A first electric cylinder is also connected to the outside of the first jack, and the movable end of the first electric cylinder is connected to the part of the second piston that extends out of the second movable cavity.

[0019] The first jack also has an oil storage chamber, which is connected to both the first and second movable chambers. A first one-way valve is provided between the oil storage chamber and the first movable chamber, allowing oil to flow only from the oil storage chamber to the first movable chamber. A second one-way valve is provided between the oil storage chamber and the second movable chamber, allowing oil to flow only from the second movable chamber to the oil storage chamber. The first and second movable chambers are connected. A third one-way valve is provided between the first and second movable chambers, allowing oil to flow only from the second movable chamber to the first movable chamber.

[0020] By adopting the above technical solution, when the first jack is working, the movable end of the electric cylinder drives the second piston to move upward. At this time, the oil in the oil reservoir is sucked into the second movable chamber. Then, the movable end of the electric cylinder drives the second piston to move downward. The second piston pushes the oil in the second movable chamber into the first movable chamber to push the first piston to move upward, thereby realizing the upward movement of the jack and pushing the support frame to move upward.

[0021] Optionally, a reset cylinder is connected to the support frame, a third piston is provided inside the reset cylinder, and a reset rod is provided on the third piston. The reset rod extends out of the reset cylinder and is connected to the slide.

[0022] Through the above technical solution, the structure of the second jack is basically the same as that of the first jack. However, the first jack can be reset by the weight of the steel box beam and the support frame. But the second jack cannot be reset on its own because it is placed horizontally. At this time, the reset rod of the reset cylinder drives the slide to reset.

[0023] Optionally, the first jack is provided with an oil outlet chamber, which is connected to the first movable chamber. The second one-way valve is located between the oil outlet chamber and the first movable chamber. A sealing plug is provided in the oil outlet chamber. An outlet chamber is opened on the side wall of the oil outlet chamber. The end of the outlet chamber away from the oil outlet chamber is connected to the reset cylinder. The sealing plug has a sealing state and an outlet state.

[0024] When the sealing plug is in a blocked state, the sealing plug will block the outlet cavity;

[0025] When the sealing plug is in the discharge state, the discharge chamber is connected to the oil outlet chamber.

[0026] By adopting the above technical solution, when the first jack needs to be lifted, the sealing plug will block the outlet cavity to prevent the oil from flowing out, so as to maintain the lifting state. When the first jack needs to be reset, the sealing plug will give way, and the outlet cavity will be connected to the oil outlet cavity. At this time, the oil will be discharged from the first movable cavity, and the first piston will be reset. At the same time, the discharged oil can be introduced into the reset cylinder as the power of the reset cylinder, realizing the utilization of the self-weight of the steel box girder and the support frame, and reducing the power cost of the reset cylinder.

[0027] Optionally, the reset cylinder is provided with a moving oil chamber, and the side wall of the moving oil chamber is provided with an oil inlet and an oil outlet. The oil inlet is connected to the discharge chamber, and the oil outlet is connected to the storage chamber.

[0028] By adopting the above technical solution, the oil in the oil outlet chamber enters the moving oil chamber through the oil inlet, pushing the third piston to move. When the slide is reset, the oil outlet is also in the same area as the oil inlet. At this time, the oil returns to the oil storage tank from the oil outlet, realizing circulation.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. The support frame is lifted by the first jack, which in turn lifts the steel box girder. The second jack facilitates the movement of the sliding block, which in turn advances the steel box girder. In addition, the upper and lower parts of the support frame can rotate relative to each other, which makes it easy to change the direction of advancement during the advancement process to adapt to the situation of the center axis offset.

[0031] 2. The upper and lower halves of the support frame are locked together by bolts for easy and quick locking;

[0032] 3. Vibration damping components are used to dampen the top plate, reducing the impact of vibration on the advancement of the steel box girder and further improving the advancement accuracy;

[0033] 4. By combining the damper with the vibration reduction spring, the top plate is buffered and energy absorbed, thereby achieving vibration reduction. Non-Newtonian fluid can better achieve buffering. At the same time, regardless of whether the shaft is close to or far from the bushing, when the instantaneous displacement is large, the shaft will be subjected to the resistance from the non-Newtonian fluid, further improving the buffering and energy absorption effect, thus ensuring the vibration reduction effect. It is especially suitable for situations where the axis is offset during propulsion.

[0034] 5. When the first jack is working, the moving end of the electric cylinder drives the second piston to move upward. At this time, the oil in the oil reservoir is sucked into the second moving chamber. Then the moving end of the electric cylinder drives the second piston to move downward. The second piston pushes the oil in the second moving chamber into the first moving chamber to push the first piston to move upward, thereby realizing the upward movement of the jack to push the support frame to move upward.

[0035] 6. The structure of the second jack is basically the same as that of the first jack. However, the first jack can be reset by the weight of the steel box beam and the support frame. But the second jack cannot be reset on its own because it is placed horizontally. In this case, the reset rod of the reset cylinder drives the slide to reset.

[0036] 7. When the first jack needs to be lifted, the sealing plug will block the outlet cavity to prevent the oil from flowing out, so as to maintain the lifting state. When the first jack needs to be reset, the sealing plug will give way, and the outlet cavity will be connected to the oil outlet cavity. At this time, the oil will be discharged from the first movable cavity, the first piston will be reset, and the discharged oil can be introduced into the reset cylinder as the power of the reset cylinder, so as to realize the utilization of the self-weight of the steel box girder and the support frame and reduce the power cost of the reset cylinder.

[0037] 8. The oil in the outlet chamber enters the moving oil chamber through the inlet, pushing the third piston to move. When the slide is reset, the outlet is in the same area as the inlet. At this time, the oil returns to the storage tank from the outlet, realizing circulation. Attached Figure Description

[0038] Figure 1 This is a top view schematic diagram showing the distribution of the assembly bracket and the jacking bracket in this utility model.

[0039] Figure 2 This is a three-dimensional structural diagram of the jacking support in this utility model.

[0040] Figure 3 This is a cross-sectional structural diagram illustrating the shock absorption component in this utility model.

[0041] Figure 4 This is a cross-sectional structural diagram illustrating the first jack in this utility model.

[0042] Figure 5 This is a schematic diagram illustrating the reset cylinder in this utility model.

[0043] In the diagram: 1. Assembly bracket; 2. Pushing bracket; 21. Support frame; 22. First jack; 221. First movable chamber; 222. Second movable chamber; 223. First piston; 224. Second piston; 2241. Electric cylinder; 225. Oil reservoir; 226. First check valve; 227. Second check valve; 228. Third check valve; 229. Oil outlet chamber; 2291. Outlet chamber; 2292. Seal 23. Blockage; 231. Second jack; 232. Reset cylinder; 233. Third piston; 234. Reset rod; 235. Moving oil chamber; 236. Oil inlet; 237. Oil outlet; 24. Slide; 248. Vibration damping groove; 25. Guide rail; 26. Vibration damping assembly; 269. Damper; 260. Shaft; 2612. Sleeve; 261. Vibration damping spring; 27. Top plate; 280. Vibration damping plate. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0045] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0046] Firstly, this application discloses a bridge jacking support system applicable to large-scale axial offset and high-drop beams.

[0047] A bridge jacking support system suitable for large-scale axis offset and high-rise beam placement, referring to Figures 1 to 5The bridge includes an assembly support 1 and a jacking support 2. The assembly support 1 has multiple rows arranged along the length of the bridge, and the jacking support 2 has multiple groups arranged along the length of the bridge. Each group of jacking supports 2 is located between two adjacent rows of assembly support 1. The jacking support 2 includes a ground support, a support frame 21, a first jack 22, a second jack 23, and a sliding block 24. The support frame 21 has an upper and a lower portion, which can rotate relative to each other in the vertical direction. The first jack 22 is fixedly installed vertically on the lower portion of the support frame 21, with one end of the first jack 22 temporarily fixed to the ground support. The second jack 23 is fixed horizontally on the upper portion of the support frame 21, with its movable end connected to the sliding block 24, which supports the steel box girder. The upper and lower portions of the support frame 21 can be relatively fixed using bolts. The first jack 22 lifts the support frame 21, thereby lifting the steel box girder. The second jack 23 facilitates the movement of the sliding block 24, thus advancing the steel box girder. Furthermore, the upper and lower halves of the support frame 21 can rotate relative to each other, allowing for changes in the direction of advancement during the process to accommodate centerline offset. The overall height is increased by ground supports, which, in conjunction with the assembly support 1, lower the girder by a certain height. A section of the ground supports and the assembly support 1 are then removed to address the issue of a large bridge descent distance.

[0048] Specifically, the upper part of the support frame 21 is provided with two guide rails 25 along the moving direction of the movable end of the second jack 23. The two guide rails 25 are located on both sides of the slide block 24, and the slide block 24 is slidably connected to both guide rails 25. The guide rails 25 guide the slide block 24, improving the stability and accuracy of the slide block 24, thereby achieving precise propulsion.

[0049] The slide block 24 is equipped with a top plate 27, which is used to contact the bottom of the steel box girder 3. The bottom of the top plate 27 is equipped with a vibration damping plate 271. The slide block 24 has a vibration damping groove for the vibration damping plate 271 to be inserted. A vibration damping assembly 26 is provided between the vibration damping plate 271 and the vibration damping groove. The vibration damping assembly 26 dampens the top plate 27, reducing the impact of vibration on the advancement of the steel box girder 3 and further improving the advancement accuracy.

[0050] The vibration damping assembly 26 includes a damper 261 and a damping spring 262. One end of the damper 261 is connected to the damping plate 271, and the other end is connected to the side wall of the damping groove. One end of the damping spring 262 abuts against the damping plate 271, and the other end abuts against the side wall of the damping groove. Through the cooperation of the damper 261 and the damping spring 262, the top plate 27 is buffered and energy absorbed, thereby achieving vibration reduction. The damping spring 262 can be a compression spring or a tension spring.

[0051] The damper 261 includes a shaft 2611 and a sleeve 2612. The sleeve 2612 has a buffer hole for the shaft 2611 to be inserted into, and the buffer hole is filled with a non-Newtonian fluid. The non-Newtonian fluid can better achieve buffering. At the same time, regardless of whether the shaft 2611 is close to or far from the sleeve, when the instantaneous displacement is large, the shaft 2611 will be subject to the resistance from the non-Newtonian fluid, further improving the buffering and energy absorption effect, thereby ensuring the vibration reduction effect.

[0052] The first jack 22 has a first movable cavity 221 and a second movable cavity 222. A first piston 223 slides in the first movable cavity 221. A lifting rod for connecting to the support frame 21 is connected to the top of the first piston 223. A second piston 224 slides in the second movable cavity 222. The top of the second piston 224 extends out of the second movable cavity 222. A first electric cylinder 2241 is also connected to the outside of the first jack 22. The movable end of the first electric cylinder 2241 is connected to the part of the second piston 224 that extends out of the second movable cavity 222.

[0053] The first jack 22 is also equipped with an oil storage chamber 225, which is connected to both the first movable chamber 221 and the second movable chamber 222. A first one-way valve 226 is provided between the oil storage chamber 225 and the first movable chamber 221, allowing oil to flow only from the oil storage chamber 225 to the first movable chamber 221. A second one-way valve 227 is provided between the oil storage chamber 225 and the second movable chamber 222, allowing oil to flow only from the second movable chamber 222 to the oil storage chamber 225. The first movable chamber 221 and the second movable chamber 222 are connected. A third one-way valve 228 is provided between the first movable chamber 221 and the second movable chamber 222, allowing oil to flow only from the second movable chamber 222 to the first movable chamber 221. When the first jack 22 is working, the movable end of the electric cylinder 2241 drives the second piston 224 to move upward. At this time, the oil in the oil reservoir is sucked into the second movable chamber 222. Then, the movable end of the electric cylinder 2241 drives the second piston 224 to move downward. The second piston 224 pushes the oil in the second movable chamber 222 into the first movable chamber 221 to push the first piston 223 to move upward, thereby realizing the upward movement of the jack and pushing the support frame 21 to rise.

[0054] In addition, a reset cylinder 231 is connected to the support frame 21. A third piston 232 is installed inside the reset cylinder 231, and a reset rod 233 is mounted on the third piston 232. The reset rod 233 extends out of the reset cylinder 231 and connects to the slide block 24. The structure of the second jack 23 is basically the same as that of the first jack 22. However, while the first jack 22 can be reset by the weight of the steel box beam 3 and the support frame 21, the second jack 23, being horizontally positioned, cannot reset on its own. In this case, the reset rod 233 of the reset cylinder 231 drives the slide block 24 to reset.

[0055] More specifically, the first jack 22 is provided with an oil outlet chamber 229, which is connected to the first movable chamber 221. The second one-way valve 227 is located between the oil outlet chamber 229 and the first movable chamber 221. The oil outlet chamber 229 is provided with a sealing plug 2292. An outlet chamber 2291 is opened on the side wall of the oil outlet chamber 229. The end of the outlet chamber 2291 away from the oil outlet chamber 229 is connected to the reset cylinder 231. The sealing plug 2292 has a sealing state and an outlet state. When the sealing plug 2292 is in the sealing state, the sealing plug 2292 seals the outlet chamber 2291. When the sealing plug 2292 is in the outlet state, the outlet chamber 2291 is connected to the oil outlet chamber 229. When the first jack 22 needs to be lifted, the sealing plug 2292 blocks the outlet chamber 2291 to prevent oil from flowing out, so as to maintain the lifting state. When the first jack 22 needs to be reset, the sealing plug 2292 makes room, and the outlet chamber 2291 connects with the oil outlet chamber 229. At this time, the oil is discharged from the first movable chamber 221, and the first piston 223 resets. At the same time, the discharged oil can be introduced into the reset cylinder 231 as the power of the reset cylinder 231, realizing the utilization of the self-weight of the steel box beam 3 and the support frame 21, and reducing the power cost of the reset cylinder 231.

[0056] The reset cylinder 231 has a moving oil chamber 234. The side wall of the moving oil chamber 234 has an oil inlet 2341 and an oil outlet 2342. The oil inlet 2341 communicates with the discharge chamber 2291, and the oil outlet 2342 communicates with the oil storage chamber 225. Oil from the oil outlet chamber 229 enters the moving oil chamber 234 through the oil inlet 2341, pushing the third piston 232 to move. When the slide block 24 resets, the oil outlet 2342 is also in the same area as the oil inlet 2341. At this time, the oil returns to the oil storage tank from the oil outlet 2342, achieving circulation.

[0057] It should be noted that the sealing plug 2292 can be driven by the electric cylinder 2241, or it can be designed to be threadedly connected to the oil outlet chamber 229 and manually driven by the operator.

[0058] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bridge launching support system suitable for large range of axis misalignment and high canting, characterized in that, It includes an assembly support (1) and a jacking support (2). The assembly support (1) is arranged in multiple rows along the length of the bridge, and the jacking support (2) is arranged in multiple groups along the length of the bridge. Each group of jacking supports (2) is located between two adjacent rows of assembly supports (1). The jacking support (2) includes a ground support, a support frame (21), a first jack (22), a second jack (23), and a slide (24). The support frame (21) has an upper part and a lower part. The upper part and the lower part of the support frame (21) can rotate relative to each other in the vertical direction. The first jack (22) is fixedly installed in the lower part of the support frame (21) in the vertical direction. The end of the first jack (22) away from the support frame (21) is temporarily fixed to the ground support. The second jack (23) is fixedly installed in the upper part of the support frame (21) in the horizontal direction. The movable end of the second jack (23) is connected to the slide (24). The slide (24) is used to support the steel box girder.

2. The bridge launching support system according to claim 1, wherein: The upper and lower halves of the support frame (21) can be fixed relative to each other by bolts.

3. The bridge launching support system of claim 2, wherein: The upper part of the support frame (21) is provided with two guide rails (25) along the moving direction of the movable end of the second jack (23). The two guide rails (25) are located on both sides of the slide (24), and the slide (24) is slidably connected to the two guide rails (25).

4. The bridge launching support system of claim 3, wherein: The slide (24) is provided with a top plate (27), which is used to contact the bottom of the steel box girder. The bottom of the top plate (27) is provided with a damping plate (271). The slide (24) is provided with a damping groove for the damping plate (271) to be inserted. A damping component (26) is provided between the damping plate (271) and the damping groove.

5. The bridge launching support system of claim 4, wherein: The vibration damping assembly (26) includes a damper (261) and a vibration damping spring (262). One end of the damper (261) is connected to the vibration damping plate (271), and the other end is connected to the side wall of the vibration damping groove. One end of the vibration damping spring (262) abuts against the vibration damping plate (271), and the other end abuts against the side wall of the vibration damping groove.

6. The bridge launching support system of claim 5, wherein: The damper (261) includes a shaft (2611) and a sleeve (2612), the sleeve (2612) having a buffer hole for the shaft (2611) to be inserted into, the buffer hole being filled with a non-Newtonian fluid.

7. The bridge launching support system of claim 6, wherein: The first jack (22) is provided with a first movable cavity (221) and a second movable cavity (222). A first piston (223) slides in the first movable cavity (221). A lifting rod for connecting to the support frame (21) is connected to the top of the first piston (223). A second piston (224) slides in the second movable cavity (222). The top of the second piston (224) extends out of the second movable cavity (222). A first electric cylinder (2241) is also connected to the outside of the first jack (22). The movable end of the first electric cylinder (2241) is connected to the part of the second piston (224) that extends out of the second movable cavity (222). The first jack (22) is also provided with an oil storage chamber (225), which is connected to both the first movable chamber (221) and the second movable chamber (222). A first one-way valve (226) is provided between the oil storage chamber (225) and the first movable chamber (221). The first one-way valve (226) allows oil to flow only from the oil storage chamber (225) to the first movable chamber (221). A one-way valve (226) is provided between the oil storage chamber (225) and the second movable chamber (222). There is a second check valve (227), which allows oil to flow only from the second movable chamber (222) to the oil storage chamber (225). The first movable chamber (221) and the second movable chamber (222) are connected. A third check valve (228) is provided between the first movable chamber (221) and the second movable chamber (222), which allows oil to flow only from the second movable chamber (222) to the first movable chamber (221).

8. The bridge launching support system of claim 7, wherein: A reset cylinder (231) is connected to the support frame (21). A third piston (232) is provided inside the reset cylinder (231). A reset rod (233) is provided on the third piston (232). The reset rod (233) extends out of the reset cylinder (231) and is connected to the slide (24).

9. The bridge launching support system of claim 8, wherein: The first jack (22) is provided with an oil outlet chamber (229), which is connected to the first movable chamber (221). The second one-way valve (227) is located between the oil outlet chamber (229) and the first movable chamber (221). The oil outlet chamber (229) is provided with a sealing plug (2292). The side wall of the oil outlet chamber (229) is provided with a discharge chamber (2291). The end of the discharge chamber (2291) away from the oil outlet chamber (229) is connected to the reset cylinder (231). The sealing plug (2292) has a sealing state and a discharge state. When the sealing plug (2292) is in a sealing state, the sealing plug (2292) will block the outlet cavity (2291); When the sealing plug (2292) is in the outgoing state, the outgoing cavity (2291) is connected to the oil outlet cavity (229).

10. The bridge launching bracket system of claim 9, wherein: The reset cylinder (231) is provided with a moving oil chamber (234). The side wall of the moving oil chamber (234) is provided with an oil inlet (2341) and an oil outlet (2342). The oil inlet (2341) is connected to the discharge chamber (2291), and the oil outlet (2342) is connected to the oil storage chamber (225).

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